Results 71 to 80 of about 11,120,519 (277)

The axion quality problem: global symmetry breaking and wormholes

Journal of High Energy Physics, 2021
Continuous global symmetries are expected to be broken by gravity, which can lead to important phenomenological consequences. A prime example is the threat that this poses to the viability of the Peccei-Quinn solution to the strong CP problem.
James Alvey, Miguel Escudero
doaj   +1 more source

Vacuum instability due to the creation of neutral fermion with anomalous magnetic moment by magnetic-field inhomogeneities

Journal of High Energy Physics, 2021
We study neutral fermions pair creation with anomalous magnetic moment from the vacuum by time-independent magnetic-field inhomogeneity as an external background. We show that the problem is technically reduced to the problem of charged-particle creation
T. C. Adorno, Zi-Wang He, S. P. Gavrilov, D. M. Gitman   +3 more
doaj   +1 more source

Nonperturbative effects in gluodynamics at T ≥ Tc

Physics Letters B, 1995
Abstract Contributions to gluon thermodynamics at temperature T > 0 due to a non-perturbative background field are calculated. The free energy is written as a double series in 1 N c and the strong coupling gs. The leading order contribution due to gluon loops in the nonperturbative background field contains explicitly the expectation ...
Yu.A Simonov, Hans-Jürgen Pirner, H. G. Dosch   +2 more
openaire   +2 more sources

Interaction of Wilson loops in confining vacuum [PDF]

, 2002
Nonperturbative and perturbative interaction mechanisms of Wilson loops in gluodynamics are studied within the background field formalism. The first one operates when distance between minimal surfaces of the loops is small and may be important for sea ...
A. B. Kaidalov, A. Bialas, A. Di Giacomo, A. Di Giacomo, A. Kramer, A. Mueller, A. Y. Dubin, B. S. De Witt, B. S. De Witt, E. A. Kuraev, F. E. Low, G. Chew, H. G. Dosch, H. G. Dosch, H. G. Dosch, H. G. Dosch, J. Honerkamp, K. G. Wilson, L. F. Abbott, L. Lukaszuk, M. E. Peskin, N. Nikolaev, N. Nikolaev, O. Nachtmann, S. Nussinov, S. V. Ivanov, S. V. Ivanov, V. Gribov, V. I. Shevchenko, V. I. Shevchenko, V. I. Shevchenko, Y. A. Simonov, Y. A. Simonov, Y. A. Simonov, Y. A. Simonov, Ya. Ya. Balitsky, Yu. A. Simonov, Yu. A. Simonov   +37 more
core   +4 more sources

Exploring the θ-vacuum structure in the functional renormalization group approach

Journal of High Energy Physics, 2022
We investigate the θ-vacuum structure and the ’t Hooft anomaly at θ = π in a simple quantum mechanical system on S 1 to scrutinize the applicability of the functional renormalization group (fRG) approach.
Kenji Fukushima, Takuya Shimazaki, Yuya Tanizaki   +2 more
doaj   +1 more source

Nonperturbative calculation of phonon effects on spin squeezing [PDF]

, 2015
Theoretical models of spins coupled to bosons provide a simple setting for studying a broad range of important phenomena in many-body physics, from virtually mediated interactions to decoherence and thermalization.
D. Dylewsky, J. Freericks, M. Wall, A. Rey, M. Foss-Feig   +4 more
semanticscholar   +1 more source

Nonperturbative effects on seven-brane Yukawa couplings. [PDF]

Physical Review Letters, 2009
We analyze nonperturbative corrections to the superpotential of seven-brane gauge theories on type IIB and F-theory warped Calabi-Yau compactifications.
F. Marchesano, L. Martucci
semanticscholar   +1 more source

Combinatorics of Boundaries in String Theory [PDF]

, 1994
We investigate the possibility that stringy nonperturbative effects appear as holes in the world-sheet. We focus on the case of Dirichlet string theory, which we argue should be formulated differently than in previous work, and we find that the effects ...
A. Cohen, A. Cohen, A. Cohen, B. Grinstein, D. J. Gross, D. Lewellen, E. Brézin, E. F. Corrigan, G. Parisi, J. Atick, J. Cardy, J. Dai, J. H. Schwarz, J. Liu, Joseph Polchinski, M. B. Green, M. B. Green, M. B. Green, M. B. Green, M. B. Green, M. B. Green, M. Li, M. R. Douglas, M. R. Douglas, N. Ishibashi, P. Ginsparg, R. Leigh, S. Shenker, W. Fischler, W. Fischler, W. Siegel   +30 more
core   +3 more sources

Numerical study of multiparticle scattering in λϕ 4 theory

Journal of High Energy Physics, 2018
We study numerically classical collisions of waves in λϕ 4 theory. These processes correspond to multiparticle scattering in the semiclassical regime.
S. V. Demidov, B. R. Farkhtdinov
doaj   +1 more source

Unitary quantization of a scalar charged field and Schwinger effect

Journal of High Energy Physics, 2020
Quantum field theory in curved spacetimes suffers in general from an infinite ambiguity in the choice of Fock representation and associated vacuum. In cosmological backgrounds, the requirement of a unitary implementation of the field dynamics in the ...
Luis J. Garay, Alberto García Martín-Caro, Mercedes Martín-Benito   +2 more
doaj   +1 more source